long believed syria has a huge stockpile of chemical weapons. now new concerns that chemical arsenal is on the move. secretary of state hillary clinton today issuing another stern warning against syria, using these weapons. the syrian foreign ministry quick to respond here saying it would not use chemical weapons against its people if it had any, but this announcement as turkey is sending warplanes to its border with syria after the syrian military bombed a nearby town of ras al-ain. you can hear that and see the smoke. this is the turkish side of the border. this is fueling more fears that more of syria's violence will spill into its neighbor to the north, being turkey. security concerns are prompting the u.n. to announce it is pulling nonessential personnel out of syria. want to bring in fran townsend, our cnn national security contributor and member of the cia external advisory committee. and, fran, good to see you. let's talk about these chemical weapons because we know that in the past, what, three, three have been, i guess, two, two different times the u.s. has seen syria move